China held a grand gathering Tuesday to celebrate the 40th anniversary of the country's reform and opening-up, a great revolution that has changed the destiny of the Chinese nation and also influenced the world.

The documentary series “40 Years on—Beijing Blooming with Us”, 40 foreign experts talk about the changes they have witnessed in Beijing as the country celebrates the 40th anniversary of reform and opening-up.

EDITOR's PICK

Visitors take a selfie during a major exhibition to commemorate the 40th anniversary of China's reform and opening-up at the National Museum of China in Beijing, capital of China, Dec. 18, 2018. The exhibition has received more than 1.6 million people since its opening.

Staff members work on the construction site of Yarlung Zangbo River bridge of the Lhasa-Nyingchi section of the Sichuan-Tibet railway on a snowy day in Gonggar County of southwest China's Tibet Autonomous Region, Dec. 18, 2018.

A staff member shows the commemorative stamps marking the 40th anniversary of China's reform and opening up at the post office of Liaoning provincial archives in Shenyang, capital of northeast China's Liaoning Province, Dec. 18, 2018.